Aircraft skid shoe



July 26, 1932 R. B. TwEED ET Al. 1,868,577

AIRCRAFT SKID SHOE Filed Nov. 25, 195o J4' 20 j? f6- z 2z fof-g4 R. ,E We@ L Zagaa 142255907@ NVENTOR sv Y. dan( nvr-romani;

WITNESS:

Patented July 26, i932 Y i Y n y f p 1,868,677,-

UNITED STATES P'AiliNi-gfozFFicE. g

Application led November 25, 1930. Serial-No. 498,136.

This invention relates to skid shoes for airlike characters of reference denote corre i craft and is especially designed for use as sponding parts, the reference characterl() a tail skid shoe for an airplane. indicates a holder which forms a part of the It is the general practice to provide skid Shoe. This holder` is made of metal and is shoes for this purpose which are made of provided with inwardly and downwardly iI1-' is 5 metal, such as iron or steel. These metal @lined Sde'and end walls. Thesey Walls are 50 shoes Wear exceedingly fast dueto frictional relIlfOrCGd by rlght angulfrly arranged," contact with the ground, the ground usually 'I'lIlSVeiSely wedge-shaped ribs 11 and 12. being of an abrasive character which rapidly The se riOS 'Capel' upwardly and together Wltph Wears the metal even where high speed steel is the mdlled walls PIOVlde a number O Sep 0 used for a Shoe, rate compartments 13, the Walls of which in- It is the purpose of the present invention 011D@ mwardly and downwardly- The from? to provide a. shoe whose ground engaging wallpf the holder 1S Preferably downwardly l surface is harder than metal, and will cut and inwardly Curved as Shown at 14 S0 21S t0 such material as sand, brick, stone, glass or PTOVidB a ruime/like Portion The top 15 1 15 even high speed Steel SO that the Shoe will of the holder is providedwith spaced front oo cut or grind into whateversurface it comes aiid retti' threaded Sockets le for the reeel* in contact with, instead of being cut` so that tion ot iooits or Sei'eWS it the letter Serving the life of the' shoe will be materially yin- .as e means oi attaohmeiit to ein aim lo which creaseL In addition, an increased gripping is carried by the tail portion 19 of an airplane.

action will result, as the shoe will cut or grind eirground and thusieslsemovement erably 'composed'ofja non-metallic abrasive substance such as ground emery and arub- Vingtisliii'doil; Olnlgeitfgope ber binder. kOther non-metallic substances ,1,2 maybe used suchfvas concrete, porcelain and 70 the like, the purposey being to provide a nonmetallio substance which will cut into the ground or other landingsurface, instead of being out; Wear therefore will be upon the ,i

metallicV abrasive material 20 which is prefabove and other advantageous features, is simple in construction, reliable and eflieient in use, and may be made at a relatively low cost. v

With the above and other objects in view, the invention further iiioiiitiee tiie ioiioiiiing the shoe In addition the action of the shoe novei features eno oietoiie oi ooostiiietioii ycuttinor into theilandiino` surface will actto to be hereinafter more fully described, illusretardethe travel of thebshoe SO that abraln trated in the accompanying drawing and im, action Wm be present pointed out in the appendedclairns. i

In the drawingz Figure 1 is a side elevation showing the tail portion of an airplane with the invention position Within the compartments la appileoi' l The invention 4is susceptible of various M 40 Figure 2 is a' bottom Pian View of the Skid changes in'itsv form, proportions and minor S5 metal rods 21 or otherreinforcing elements so as to bind together more eifectually the com- The compartments 13 are filled with a non- .55 i

landing surface orv ground instead of upon 75 The Vmaterial 20 mayl beprovided with to Shoe; A f details of construction andtlie'right is hereL i Fgules 3 and t are Sectlonal VlewS taken in reserved to make such changes as properly respectively 0n the HUGS 3-3 21nd i4-4 0f fall Within the scope ofthe appended claim. Figure 2. Y l Having described the invention what is Referring to the drawing in detail wherein claimed `is :v-V y f i An aircraft skid shoe Comprising a hollow holder open at its lower side and having interior side Wall surfaces converging toward said open side and a filling of non-metallic material having metallic reinforcing binding elements fitting snugly against the converging Wall surfaces of the shoe, the lower surfaces of the filling being flush with the lower edges of the body.

In testimony whereof We aix our signatures.

RUSSELL B. TW'EED. CLAYTON WATSON. 

